rasterToAmigaBasicShape: Convert a grDevices raster object into an AmigaBasicShape...
In AmigaFFH: Commodore Amiga File Format Handler

rasterToAmigaBasicShape

R Documentation

Convert a grDevices raster object into an AmigaBasicShape class object.

Description

Convert a raster object into an AmigaBasicShape class object.

Usage

rasterToAmigaBasicShape(
  x,
  type = c("blitter object", "sprite"),
  palette,
  shadow,
  collision,
  ...
)

Arguments

`x`	A `raster` class object to convert into a `AmigaBasicShape` class obejct.
`type`	A `character` string indicating what type of graphic needs to be created: "`blitter object`" (default) or "`sprite`".
`palette`	A `vector` of `character` strings, where each element represents a colour. This palette is used to quantize the colours that occur in the `raster` `x`.
`shadow`	An optional layer that could be stored with the graphics. This layer could be used for specific shadow effects when blitting the graphics to the screen. It needs to be a `raster` object consisting of the colours black (bit unset) and white (bit set). The raster needs to have the same dimensions as `x`. This layer will be omitted when this argument is omitted (or set to `NULL`).
`collision`	An optional layer that could be stored with the graphics. This layer could be used for collision detection between graphical objects. It needs to be a `raster` object consisting of the colours black (bit unset) and white (bit set). The raster needs to have the same dimensions as `x`. This layer will be omitted when this argument is omitted (or set to `NULL`).
`...`	Arguments passed onto `index.colours`. Can be used, for instance, to achieve specific dithering effects.

Details

This method can be used to turn any graphics into an AmigaBasicShape class object. In order to do so, the colours of the input image (a raster object) will be quantized to a limited palette. This palette can be forced as an argument to this function. Otherwise, it will be based on the input image.

Value

Returns an AmigaBasicShape class object based on x.

Author(s)

Pepijn de Vries

Examples

## Not run: 
## get a raster image:
ilbm <- as.raster(read.iff(system.file("ilbm8lores.iff", package = "AmigaFFH")))

## convert to an Amiga Basic blitter object:
bob <- rasterToAmigaBasicShape(ilbm, "blitter object")

## End(Not run)

AmigaFFH documentation built on Aug. 27, 2023, 9:07 a.m.